(Headbang)

so i have done so How does that equal ???

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- May 22nd 2011, 07:25 AMadam_leedsSelf Inverse
(Headbang)

so i have done so How does that equal ??? - May 22nd 2011, 07:30 AMSpringFan25
Shouldn't it be ?

it may be easier to write

Which is a quadratic, so

and hence the inverse is

- May 22nd 2011, 07:33 AMadam_leeds
- May 22nd 2011, 07:49 AMSpringFan25
(not sure if you saw my previous post before i edited it to include the answer)

using your formula you should get the same answer as i posted:

multiple everything by f^-1(x):

this is a quadratic in . the coefficients (a,b,c) are (-1,-x,2)

Solve with quadratic formula